Crank and like case



Dec. 11, 1928. 1,694,535

E. FEJES CRANK AND LIKE CASE Original Filed Sept. 5, 1923 Patented Dec.Il, 1928.

UNITED STATES EUGENE FEJES, OF BUDAPEST, HUNGARY.

CRANK AND LIKE CASE.`

Original application led September 5, 1923, Serial No. 661.110, and inGermany October 13, 1922. Divided.- and this application led August 12,1926. Serial No. 128,868.

This invention relates to screw connections between the various platesot a crank or like casing of an internal combustion engine, some otwhich plates are made ot thin metal sheet whilst others arecomparatively thicker. The screw connections provided according to thepresent invention are used at those parts of the casing where two ormore plates lying at right angles to one another lo have to be connectedtogether. As the thickness ot' the plates is substantially smaller thanthe diameter of the connecting screw, it is not possible to tix thescrew directly into a plate which is arranged parallel to the axis ofthe screw.

According tothe present invention the plates which are arranged at rightangles to one another are connected together by means of a metal vblockwhich is provided with welding fillets and a screw-threaded hole for thereception of a screw.

The invention is illustrated, by way of example, in the accompanyingdrawings in which,

Figure 1 illustrates in perspective view and partly in section a crankcasing of an internal combustion engine.

Figure 2 illustrates partly in elevation and partly in sectionalelevation one form of construction of the improved screw device asapplied to the connection between a vertical plate and an adjacenthorizontal plate.

Figure 3 is a similar view as applied to a connection between twovertical plates and an adjacent horizontal plate.

Figure 4 is an elevation of the construction shown in Figure 3.

Figures 5 and 6 illustrate in sectional elevation and end viewrespectively a further modilication of the improved screw device.

Referring to Figure 1, 1 is the sheet iron base oi" the crank casing 2,3,V 4 and 5 being supporting vertical sheet iron plates carrying the topplate 6, whilst 7 and S are two side plates of the crank casing. Thevertical plates may be connected to the top plate in the mannerdescribed in the concurrent patent application Number 661,110, that isto say, by providing the top plate with slots 10 and forming thevertical plates with tongues 9 fitting in the said slots, the edges ofthe iillets and of ridges 13 formed in the top plate being weldedtogether. The ridges 13 in the top plate 6 are formed by cutting grooves12 on either side of the slot 10 at such a distance from the slot 10 asto leave a portion of metal of approximately the same thickness as thethickness of the vertical plates. A metal block 15 constituting aconnecting nut is provided between two parallel support-ing plates 4 and5. On the sides facing the supporting plates the said nut is providedwith an annulaiwelding fillet 16 which has the same thickness as thesupporting plates 4 and 5. The welding fillets engage in circularopenings 19 formed in the supporting plates and are autogenously weldedto the latter. A further welding fillet 18 is'provided at the lower edgeof the nut 15 by means of which welding iillet the nut is welded ontothe base 1 of the casing. The nut 15 is further provided with ascrew-threaded hole :in which engages a screw by means of which themetal block is further secured to the base of the casing.

Use is preferably inade of the modification illustrated in Figure 2 whena connection is to be effected between a vertical and a horizontal plateadjacent thereto. The nut 15 is subdivided into two parts 15 and 15 andthe supporting plate 17 conres to lie between the two parts of the nutas will also be seen on the leithand side of Figure 1. The two parts ofthe nut are also provided with welding fillets 16 which have the samethickness as the supporting plates to which they are secured byautogenous welding. rihe screw-threaded hole for the reception of theconnecting screw is formed in the central plane of the supporting plate17 so that the screw shall properly engage with both parts of the screwnut Referring to-the construction illustrated in Figures 3 and 4 thesame shows more clearly the nut connection illustrated on the right-handside of Figure 1.

It the vfillets and the plate to be connected thereto are not of thesame thickness, in addition to the circular hole formed in the thickplate for the reception ot the annular welding lillet of the nut anannular groove is formed around the said hole at such a distance as toleave a narrow ridge of substantially the same thickness as the annularwelding fillet, the latter being edge-welded to the said annular ridge.This form of construction is illustrated in Figures 5 and 6 in which 19is the circular hole, 16 the annular welding lillet of the nut 15, 13

the narrow annular ridge formed Von the plate and l2 the annular grooveformed ad'- jacent to the ridge. For the .roduction of the weld thelatter is preferab y located loe-` low the machining plane of the thickplate which is formed with the annular hole.

By this construction simultaneous fusionV of the contacting parts isassured during the welding and since only loca-l heating takes place thefinished welded piece will practically not be distorted. y

Other casing used in connection with internal combustion engines, suchas gear cases may be constructed in the same manner as hereinbeforedescribed.

1. In combination, thin and comparatively thicker plates lying at rightangles to one another and connecting means between such plates, saidconnecting means including a metal block having a screwthreaded holeadapted to be engaged by a connecting screw and narrow welding filletswhereby the block is edge-welded to the plates.

2. In combination, plates of different thickness lying at right anglesto one another and connecting means between such plates, said connectingmeans including a metal block having a screw-threaded hole adapted to beengaged by a connecting screw and a narrow welding annular fillet bywhich the block is edge-welded to one of the plates which latter platehas a circular hole for receiving such annular fillet.

3. An arrangement as claimed in claim 2 and in which the block also hasa welding fillet byV which it is edge-welded. to a plate lying at rightanglesrto the plate to which ile iblock 1s edge-welded by the annular 4.In combination, thin and com aratively Y thicker plates lying at rightang esto Vone another and connectingl meansbetween such plates, saidconnecting meansl including a metal block having a screwthreaded holein` tended to be engaged by a connecting screw and a narrow weldingannular fillet by which the block is edge-welded to one of the plates,which latter plate is comparatively thick and has a circular hole forthe reception of the said narrow annular fillet, an annular ridgel towhich the said annular fillet is welded and an annular groove around thesaid ridge.

5. An arrangement as claimed in claim 4 and in which the weld along theedge of the annular welding fillet of the block and along the annularridge, lies below the outer surface of the plate in the circular hole ofwhich the annular fillet is fitted, for the purpose set forth.

6. In combination, plates of different thickness lying in angularrelation to one another, and connecting means between said plates, saidconnecting means including a metal block having welded filletsedgewelded to cert-ain of said plates, said metal block having a screwthreaded hole adapted to be engaged by a connecting screw.

In testimony whereof I have signed my name to this specification.

EUGENE FEJ ES.

